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Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 1,516,841	$ 1,534,512
Gross Unrealized Gains	5,424	278
Gross Unrealized Losses	(222,564)	(266,765)
Fair Value	1,299,701	1,268,025
U.S. Treasury and U.S. government sponsored entities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	145,439	149,712
Gross Unrealized Gains	113	0
Gross Unrealized Losses	(17,597)	(21,616)
Fair Value	127,955	128,096
State and political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	644,880	651,705
Gross Unrealized Gains	4,792	266
Gross Unrealized Losses	(93,503)	(121,891)
Fair Value	556,169	530,080
Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	18,554	4,181
Gross Unrealized Gains	187	0
Gross Unrealized Losses	(466)	(302)
Fair Value	18,275	3,879
Mortgage-backed securities - residential
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	624,529	672,784
Gross Unrealized Gains	1	12
Gross Unrealized Losses	(104,144)	(117,654)
Fair Value	520,386	555,142
Collateralized mortgage obligations
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	80,227	52,291
Gross Unrealized Gains	331	0
Gross Unrealized Losses	(6,559)	(4,937)
Fair Value	73,999	47,354
Small Business Administration
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	3,212	3,839
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(295)	(365)
Fair Value	$ 2,917	$ 3,474

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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